Is that EU or US? For EU, let me say that I played on Gandara since launch with a 2 week trip to Piken Square. Both can be recommended with the limitation that PS officially is a med-pop server, the unofficial EU RP server and has a strong WvW focus.

In general, and I say that as a player with little interest in PVP, let me say that I believe GW2's strongest asset is WvW and most long-term motivation will result from this, unless Arenanet pushes out more dungeons at least every 2 months in the future - which is highly unlikely.